I have interpreted your request as a prompt for an "Engineering Mystery" story feature. I have treated the phrase "the directors dirty little top" as a descriptive title for a specific piece of evidence (a unique mechanical component) within that mystery.
The Goal: You must sift through "leaked" memos, scripts, and personal correspondence to uncover the truth behind a "dirty secret" that could bring down a Hollywood titan. eng mystery mail the directors dirty little top
1. The Incident (The Hook) The Aethelgard crashes during an atmospheric entry simulation. The crash is blamed on pilot error. The board of directors wants the investigation closed quickly to secure more funding. Enter Elias Thorne, a skeptical forensic engineer tasked with signing off on the wreckage. I have interpreted your request as a prompt
Here is a solid feature treatment for the story. The Plot Arc 1
It sounds like you're working on a mystery mail experience, possibly similar to the Spies, Lies and Serious Bad Guys adventure from Mail Order Mystery